Office: L237, QuSoft/CWI
Phone: +31 (0)20 592 4328
E-Mail: m.walter@uva.nl

I am an Assistant Professor at the University of Amsterdam (KdVI, ITFA, ILLC) and a Senior Researcher at QuSoft. My office is located at the Centrum Wiskunde & Informatica (CWI).

My research is in quantum information theory and its connections to mathematics, fundamental physics & computing. I am in part supported by an NWO Veni grant on Quantum bits in space and time. I am part of the NWA quantum/nano route and a member of the Geometry and Quantum Theory mathematical research cluster.

Motivated by quantum information, I also study mathematical problems in representation theory and invariant theory through the lens of classical and quantum computation.

Curriculum vitae: [pdf]

Group

  • Freek Witteveen: quantum information & field theory (PhD candidate)
  • Bas Dirkse: multiparty protocols for quantum networks (PhD candidate, joint with TU Delft)
  • Raja Damanik: optimal stabilizer testing (MSc project)
  • Casper Guyrik (MSc project, joint with Ronald de Wolf)
  • Philip Roeleveld: tensor scaling algorithms (BSc project)
  • Wouter Borg: entanglement in stabilizer states (BSc project)

I am currently recruiting PhD students and postdocs – please get in touch for further information (with a brief summary of research interests and CV)!

Publications and Preprints

See the arXiv (and also GitHub).

New article published in PRX: popular summary & article

Teaching

I am currently teaching a course on Symmetry and Quantum Information (Spring 2018). See here for more information.

I previously taught a similar course at Stanford University. Watch this lecture as a teaser. I also taught an abridged version of this course at IES in Cargese.

See here and here if you are looking for a Google Summer of Code project!

Quantum Software and Society

Selected Talks

  • “Quantum marginal problem, tensor scaling, and invariant theory”, NMC 2018 [pdf]
  • “Schur-Weyl Duality for the Clifford Group: Property testing, de Finetti representations, and a robust Hudson theorem”, QIP 2018 [pdf] [video]
  • “When is a quantum state a stabilizer state?”, QuSoft 2017, QuTech 2018 [pdf]
  • “Bulk reconstruction, error correction, and recovery maps”, KITP 2017 [video]
  • “Rigorous entanglement renormalization from wavelets”, KITP 2017, Caltech 2017 [pdf] [video] [pdf]
  • “Tensor network models of holography”, DESY 2017
  • “When is a state a stabilizer state? Testing stabilizer states with six copies”, CWI 2017
  • “Tensors and Quantum Physics”, Auburn 2017 [video]
  • “Multiparty entanglement, random codes, and quantum gravity”, Coogee 2017 [pdf], “Multipartite entanglement in toy models of holography”, Simons Center for Geometry & Physics 2016 [pdf] [video]
  • “Entanglement in random tensor networks”, Georgia Tech 2016 [pdf]
  • “Holographic duality from random tensor networks”, MIT 2015, KITP 2016, Cologne 2016, IQC 2016 [pdf] [pdf] [video] [other]
  • “Moment polytopes & computational complexity”, Berkeley 2015 [pdf]
  • “The Holographic Entropy Cone”, ETHZ, Caltech, CRM 2015; QIP 2016 [pdf short] [video] [pdf long]
  • “Kronecker coefficients and complexity theory”, Dartmouth 2015, Rome 2016 [pdf]
  • “Topologically ordered models in higher dimensions”, QGQIT 2015 [pdf]
  • “Random Quantum Marginals”, IAS 2014 [video]
  • “A Heisenberg Limit for Quantum Region Estimation”, ISIT 2014 [pdf]
  • “The Quantum Marginal Problem”, DPG Spring Meeting 2014 [pdf]
  • “Entanglement Polytopes”, QIP 2013; QSIT Lunch Seminar [pdf] [video] [science] [pdf] [explorer]
  • “Quantum Entropies and Representation Theory”, IHES 2013 [pdf]
  • “Computing Multiplicities of Lie Group Representations”, FOCS 2012 [pdf] [video]
  • “Quantum State Tomography of 1000 Bosons”, SPS Meeting 2012 [pdf]
  • “Quantum Marginals and Classical Moments”, IMS 2013 [pdf]
  • “Eigenvalue Distributions of Reduced Density Matrices”, ICMP 2012 [pdf]

Software

Other